GMU 11 is an affordable, microprocessor-based magnetometer that is used with Garmin G5, G3X, and G-500/TXi EFIS Systems. It can be used to accurately sense the Earth’s magnetic field alignment and provide this data to compatible ADAHRS processors for use in referencing aircraft magnetic heading. In essence, the magnetometer acts as an electronic compass, showing the ADAHRS which direction the aircraft is facing in relation to magnetic north.
Unlike conventional flux valve systems, which detect only the horizontal component of the Earth’s magnetic field, the GMU 11 magnetometer provides full 3-axis vector measurements for the most precise digital indication of magnetic field strength and direction.
What’s more, because it’s an all solid-state design, GMU 11 offers low power consumption as well as easy installation and calibration. On most aircraft, GMU 11 is mounted in a separate remote location from the ADAHRS and other electronics — typically outboard in the wing, tail section or vertical stabilizer — to minimize any external magnetic interference.
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